Britain has engaged in a third wave of "proportionate and targeted" strikes alongside its US allies against Houthis in Yemen to further degrade their capabilities, the government said on Saturday.
"The Royal Air Force engaged in a third wave of proportionate and targeted strikes against Houthi military targets in Yemen. We acted alongside our US allies, with the support of many international partners, in self-defence and in accordance with international law," Defence Minister Grant Shapps said in a statement.
US officials told Reuters earlier in the day that the US had launched a series of strikes against targets in Yemen.
Britain and the US have launched coordinated strikes in Yemen this year against Houthi forces, who have been attacking shipping in the Red Sea in what they describe as acts of solidarity with the Palestinians against Israel.
That has fuelled fears that the conflict could spread to other regions in the Middle East.
"This is not an escalation. We have already successfully targeted launchers and storage sites involved in Houthi attacks, and I am confident that our latest strikes have further degraded the Houthis’ capabilities," Shapps added.
US President Donald Trump has responded with a swift rejection of Iran's response to a US peace proposal on Sunday that included ending the war on all fronts, including Lebanon, providing compensation for war damages, and emphasising Iranian sovereignty over the Strait of Hormuz.
Iran has sent its response to a US proposal for peace talks to end the war, Iranian state media reported on Sunday, as two ships were allowed to pass through the blockaded Strait of Hormuz.
Groups of passengers and crew disembarked from a cruise ship hit by a deadly hantavirus outbreak on Sunday to be evacuated to their home countries where they will isolate according to national protocols to prevent further spread of the disease.
Israeli strikes killed at least three Palestinians in Gaza on Sunday, including two members of the Hamas-run police force, health officials said, in violence that underscored the fragility of a US-brokered ceasefire.